Facebook's underwriters were able to keep Facebook's stock price above the IPO level on the first day of trading, last Friday, but it seems that the company is off to a rough start in public trading as stock price is down $4, €3.13 from the IPO level and traded as low as $33, €25.8 Facebook debuted at $38, €29.7 and ended its first day of trading at $38.23, €29.9.
There's no way of knowing why the share price is falling, at least in the first hour of trading, but the safe bet is on the fact that Facebook's share price didn't "pop" on Friday as everyone was expecting.
Investors that were expecting to make a quick buck in the first day off people eager to buy Facebook stock but who didn't have privileged access to it, like clients of the banks that underwrote the IPO had, are now less confident that prices will soar and are looking to get rid of their shares.
There's no reason to worry even if Facebook dips well below this level, the company is in it for the long run and it's already maximized the amount of money it could make in the IPO.